Novak Djokovic: Top-Ranked Tennis Player, 'Expendables 2' Action Star

Novak Djokovic is the top-ranked men's tennis player in the world, so his next logical career step would be to obviously act in a blockbuster movie with a consortium of aging action stars. According to Deadline, the 24-year-old Djokovic will have a camero in the upcoming sequel, 'Expendables 2,' which means he's decades younger then pretty much every one of his co-stars. How much younger, you ask? Let's find out!